Paper manufacture



Patented Feb. 16, 1932 UNITED STATES PATENT ornca FRITZ m FUCHS, EASTORANGE, NEW JERSEY, ASSIGNOB TO THE BPMIALTY ilODUCTB UOHPANY, mo, 0]NEW YORK, N. Y., A CORPORATION 01' NEW JERSEY PAPER MANUFACTURE IoDrawing,

The object of this invention, is to roduce a transparent paper of somesuitab e weight and of relatively great strength.

I am aware that tissue papers have been 5 produced, and that tissuepapers have been subjected to waxing, and to other treatments which makethem transparent to a certain extent. However, the transparency of suchpapers has been limited by the inability to impregnate the fibres with amaterial that would give them a transparent appearance, and thereforesuch papers have been only semi-transparent; that is, they have beenstreaked, or the fibres thereof, have been plainly evident. An object ofmy invention, then, is to make a paper almost totally transparent.

The use of papers in wrapping such articles as candy boxes, has beendiscontinued for the reason that a product has been found whollytransparent and. waterproof, the use of which improves the appearance ofthe package. My object is to make a paper that can be used as asubstitute for this other material, which will be equally transparent;equally waterproof, and therefore equally attractive.

Another object of my invention is to produce a trans arent paper thatmay later be waxed, and t erefore in obtaining the trans parency, Iemploy a material that will not be wax repellant, and to accomplishthese desirable results, I proceed generally as follows I produce a oodquality of tough paper of desirable weight. A white bond paper ispreferred; of course, without the usual water marks. I may use any ofthe so-called straight grain paper; that is, a linen pa er, or astraight wood fibre roduct. his paper is pre ared in the o inary mannerup to the ca endering. For the purpose of calendering, water is usuallyused, but I have found that the addition of soluble, or mulsibed, fatty,and mineral oils to the water in Application filed Inch 18, 1929. SerialIo. 348,814.

the dampener previous to calendaring, will produce a very desirableefiect.

In m experiments, I have em loyed with a high egree of satisfaction awhite emulsilied mineral oil, having no odor-being practicallynon-oxidizing.

In my experiments, I have employed a proximately a two-percent emulsion,but 0 percentage must obviously be varied according to the qualitdensity and construction of the paper, an to the extent of transparencydesired, and also the use of different oils will require a diiference inthe percentage. This treatment allows for subsequent waxing; in fact, ahigher degree of lustre is obtainable after this treatment, and I havealso found that this treatment results in the production of a paper ofreater smoothness and more umty, as t e oil serves to soften the fibresand allows the calendering rolls to smooth out the fibres and polishthem as well.

I have also found that the use of a small amount of oil will not preventsubsequent gluing, and as a consequence, my paper may readily serve as awrapper as previously de scribed.

It will of course be understood that the emulsified, or soluble oil ismixed with Water, and that dampening and calendering takes 75 place inthe usual manner, and therefore what I claim and desire to secure byLetters Patent is 7 1. The production of transparpnt papers, whichconsists of dampening the paper prior to calendering, with a solutioncontaining a relatively low percentage of emulsifiable oil till inwater,

2. The method of producing transparent paper, which consists ofdampening the 35 aper prior to calendering, with a relatively owpercentage of a non-oxidizing, clear white oil emu sified in water.

3. The method of producing transparent paper, which consists ofdampening the 99 paper prior to calendering with a relatively lowpercentage of non-oxidizin clear white oil, emulsified in water, amlfater waxing said aper.

5 4. he method of producing transparent paper, of high lustre, whichconsists of moistening sand paper prior to calendering', with anemulsion containing a low percentage of non-oxidizing clear whitemineral oil and water, and thereafter finishing said paper.

' FRITZ EMIL FUCHS.

